Process of making cartridge-shells.



EDWARD C. BELL AND RAYMOND S. CASE, OF UNIONVILLE, CONNECTICUT.

PROCESS OF MAKING CARTRIDGE-SHELLS.

No Drawing.

To all whom it may concern Be it known that we, Enwann C. BELL andRAYMOND S. Cass, each a citizen of the United States, residing atUnionville, in the county of Hartford and State of Connecticut, haveinvented a new and Improved Process of Making Cartridge-Shells, of whichthe following is a specification.

Our invention relates to the process above set out, and an object of ourinvention, among others, is to provide a process by means of whichcartridge shells of a superior quality may be produced in a particularlyeflieient manner.

In the making of paper 'shclls more particularly used to contain acharge of powder,

with or without other material, a tube is generally formed and is thencut up into proper lengths to provide the shells, these short lengthsbeing supplied with the caps and other devices forming the completeshell.

It is desirable that the inner surface of the shells shall be coatedwith a material, as paraiiin, which is of particular advantage in thatit prevents the inner surface of the shell from being scorched or burnedwhen the powder is ignited, This paraflin may be applied in the simplestmanner, by dipping the shells. in baths of melted paraflin, thustreating the outside as Well as the inside of the shell. It is alsoessential that the outside of the shell shall be treated with aWater-proof coating in order that it Will not be delrilnentally affectedby changes in atmospheric conditions. It is advisable to apply paratlinto the surface of the paper comprising the tube in as small quantitiesas possible for the reason that the paraffin injures the fibers of thepaper to an extent to weaken the shell to a certain degree, and whilethe advantages of the paraflin are such as to requireaits use on theinner surface of the tube we have provided means whereby just asullicient quantity may be applied to each of the shells to get all ofthe advantages required and at the same time these quantities will notbe exceeded to an extent to injure the shell to a material degree.

In carrying out our process a tube is prepared as by rolling up a stripof paper into Specification o'fIetters'Patent.

Patented Jan. 25, rare.

Application filed August 15, 1914. Serial No. 856,978.

several plies and treated with an adhesive, the tube, when completed,being in a moist state. vThe tube is then thoroughly dried after whichit is treated on its outer surface with a water-proofing material sothat the cartridges produced therefrom will not be affected byatmospheric conditions to an extent to change their size orcharacteristics. This water-proofing material need not be confined toany particular composition, but we have found that a water-proofingmaterial comprising the characteristics of the cellulose mixtures willproduce satisfactory results. In many instances it is desired that thefinished cartridge shall be colored and when such a cartridge is to beproduced, the desired coloring matter may be incorporated in thewater-proofing material and treated therewith, this waterproofingmaterial effectually preventing the colors from being injuriouslyaffected in the handling of the tubes or shells. After the tubes arethus treated with the water-proofing material, with or without color,they are dipped in a bath of paraffin, having such characteristics thata very thin coating will be applied to the tubes, in fact just enough ofthe paraffin being applied to provide the qualities required on theinner surface of the shell. The outer surface of the shell being treatedWith the water-proofing material, the paraflin Will not penetrate thepaper composing this surface of the shell. The water-proofing material,when mixed with color, also now effects another purpose, and that is, itprevents the color from running under the influence of the hot moistparaflin.

We claim 1. The process of making a cartridge tube that consists informing the tube from paper by rolling several plies one upon another,drying out the tube, then treating the completed tube with awater-proofing material, and then treating both its outer and innersurfaces to a coating of paraffin.

2. The process of making a cartridge tube that consists in forming thetube from the proper material by rolling several plies one upon another,then drying out the tube, then treating the completed tube to awaterproofingmaterial with color ng matter forming a part thereof, andthen treating both water-proofing material, and then treating the outerand inner suriaees of said tube to the Wh le tube to a coatingofgaraflin. a thin coating ofparaflin. p EDWARD BELL. S

3. The process of making a cartridge tube I RAYMOND S. CASE. 3 thatconsists in' forming the tube byrolling Witnesses: several plies ofpaper one upon another, RoB'r. GILLESPIE,

then treating the outside of the tube with a ALMA OLSEN.

